3 DBIx::Class::Manual::SQLHackers::INSERT - DBIx::Class for SQL Hackers - INSERT
7 =item L<Introduction|DBIx::Class::Manual::SQLHackers::Introduction>
9 =item L<CREATE|DBIx::Class::Manual::SQLHackers::CREATE>
13 =item L<SELECT|DBIx::Class::Manual::SQLHackers::SELECT>
15 =item L<UPDATE|DBIx::Class::Manual::SQLHackers::UPDATE>
17 =item L<DELETE|DBIx::Class::Manual::SQLHackers::DELETE>
19 =item L<BEGIN, COMMIT|DBIx::Class::Manual::SQLHackers::Transactions>
25 INSERT INTO users (id, username, dob, realname, password)
26 VALUES (1, 'fredbloggs', '1910-02-01', 'Fred Bloggs', 'secretpass');
28 =head2 Simple bulk insertion, populating rows
30 The B<populate> method is for inserting chunks of data to pre-populate / initialise a database with a set of known values. In void context it uses DBI's optimized "execute_for_fetch" method.
32 In scalar or list context populate is a proxy to the B<create> method (on which more below), and returns Row objects.
36 =item 1. Create a Schema object representing the database you are working with:
38 my $schema = MyDatabase::Schema->connect('dbi:SQLite:my.db');
40 =item 2. Call the B<populate> method for the ResultSource you wish to insert data into:
42 $schema->populate('User', [
43 [qw(id username dob realname password )],
44 [ 1, 'fredbloggs', '1910-02-01', 'Fred Bloggs', 'secretpass' ],
49 Note that in void context you can skip passing primary key values that will be supplied by the database, and any other values that are allowed to DEFAULT. However no code in your Result classes will be run (e.g. InflateColumn components).
51 =head2 Constructing and inserting Row object
53 INSERT INTO users (username, dob, realname, password)
54 VALUES ('fredbloggs', '1910-02-01', 'Fred Bloggs', 'secretpass');
56 In the course of your application, you will often want to retrieve data from a user, insert it into the database, then continue to use or manipulate the resulting object (the object represents the state of the corresponding database row immediately after creation)
60 =item 1. Obtain a Schema object:
62 my $schema = MyDatabase::Schema->connect('dbi:SQLite:my.db');
64 (Ideally you will always have one of these handy, no need to make many connections to the database.)
66 NB: DBIx::Class does not store a Singleton schema object for you, calling C<connect> again will create a new Schema object with a new database connection. Avoid doing this, store and re-use the Schema object.
68 =item 2. Create a User object:
70 my $newuser = $schema->resultset('User')->new({
71 username => 'fredbloggs',
73 realname => 'Fred Bloggs',
74 password => 'secretpass',
77 B<$newuser> is now a DBIx::Class::Row object, containing uninserted data. This can be verified by calling C<< $newuser->in_storage >>, which will return false.
79 =item 3. Insert the user's data into the database:
83 $newuser has been updated to contain the auto-incremented id value in its primary key field (id). C<< $newuser->in_storage >> now returns true.
85 You can also shortcut these two methods if you don't need to build up the Row object before inserting:
88 my $newuser = $schema->resultset('User')->create({
89 username => 'fredbloggs',
91 realname => 'Fred Bloggs',
92 password => 'secretpass',
95 Now B<$newuser> is a Row object containing data that represents what is in the database.
99 =head2 Add a post for this user
101 INSERT INTO posts (user_id, created_date, title, post)
102 VALUES (1, '2010-03-24T09:00:00', 'First post!', 'Just testing my blog');
104 Now that we have a user, they would like to submit their first blog post. We already have the user object, from creation, or from the session when they logged in, so we can create posts using it.
108 =item 1. Add a post for an existing user:
110 ## Remember, create == new and insert.
111 my $post = $user->create_related('posts', {
112 created_date => '2010-03-24T09:00:00',
113 title => 'First post!',
114 post => 'Just testing my blog',
119 This does not require us to dig out the user's database id and pass it to the insert call for the posts table, as it is already contained in the $user object.
121 =head2 Insert a new user and their first post
123 INSERT INTO users (username, dob, realname, password)
124 VALUES ('fredbloggs', '1910-02-01', 'Fred Bloggs', 'secretpass');
126 INSERT INTO posts (user_id, created_date, title, post)
127 VALUES (1, '2010-03-24T09:00:00', 'First post!', 'Just testing my blog');
129 This is a somewhat contrived example, as hopefully you'll want to create the user, and confirm who they are via email confirmation or similar, before allowing them to submit a blog post. Maybe it can be used for commenters and comments..
133 =item 1. Create a Schema object:
135 my $schema = MyDatabase::Schema->connect('dbi:SQLite:my.db');
137 (You still have one of these, right?)
139 =item 2. Collect the User and first Post data:
141 my $user_and_post = {
142 username => 'fredbloggs',
144 realname => 'Fred Bloggs',
145 password => 'secretpass',
147 created_date => '2010-03-24T09:00:00',
148 title => 'First post!',
149 post => 'Just testing my blog',
153 =item 3. Create the User object together with the post data:
155 my $newuser = $schema->resultset('User')->new( $user_and_post );
157 =item 4. Insert the user and post data into the database:
161 This also can be shortcut using B<create>:
164 my $newuser = $schema->resultset('User')->create( $user_and_post );